This is a sketch which I requested, but also colored. I do not own the original art.
Boltclank Krankcase is not canon as he is only in an AU.
Dr. Krankcase and Luminous are shown expecting their baby, Luminous is pregnant with Boltclank.
The first pic is a clothed version, the second pic is a headgear version,and the third pic is a headgearless version. And the forth pic is the original sketch which is not mine.